This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Piezo Electric Transducers”.
1. Process of physical deformation on application of electric field is described by ___________
a) Electromagnetic property
b) Electro mechanical property
c) Magnetostriction property
d) Electrostriction property
View Answer
Explanation: Electrostriction property is defined by physical deformation of certain materials on the application of electrical field.
2. Who invented the piezoelectric effect?
a) Mary Elizabeth Barber
b) Christian Doppler
c) Marie curie and Pierre curie
d) Pierre curie and Jacques curie
View Answer
Explanation: Piezoelectric effect was first invented and explained by curie brothers, Pierre curie and Jacques curie in 1980.
3. Which of the following represents piezoelectric materials?
a) ADP
b) Quartz
c) Bernilite
d) All of the mentioned
View Answer
Explanation: Quartz, ADP (Ammonium dihydrogen Phosphate), and bernilite are examples of piezoelectric materials.
4. Property of exhibiting electric polarization when exposed to intense electric field is known as ___________
a) Electromagnetic effect
b) Ferromagnetic material
c) Ferroelectric materials
d) Piezoelectric materials
View Answer
Explanation: Piezoelectric and Ferroelectric materials are closely related and they produce electric polarization when exposed to an intense electric field.
5. Which of the following quantities cannot be measured using piezoelectric transducers?
a) Pressure
b) Strain
c) Acceleration
d) None of the mentioned
View Answer
Explanation: Piezoelectric transducers can be used to measure a wide range of quantities like pressure, acceleration, strain displacement etc.
6. Which of the following can be used conveniently at 1000c temperature?
a) Rochelle salt
b) ADP
c) Both ADP and Rochelle salt
d) None of the mentioned
View Answer
Explanation: Rochelle salt is suitable for operation at room temperature only while ADP (Ammonium dihydrogen Phosphate) can be used up to temperature 1000c.
7. Which of the following type transducers are used in IC engines?
a) Monomorph
b) Dimorph
c) Multimorph
d) All of the mentioned
View Answer
Explanation: Multimorphes are the combination of more than two transducers, it is suitable in IC engines where pressure variations occur at high frequencies up to 20 KHz.
8. __________ are also known as piezopile.
a) Monomorph
b) Dimorph
c) Multimorph
d) None of the mentioned
View Answer
Explanation: Multimorphes are combination of more than two transducers are also known as piezopile.
9. Piezoelectric accelerometer requires damping system.
a) True
b) False
View Answer
Explanation: Since natural frequency of piezoelements are so high and far removed from range of frequencies normally required of accelerometers they don’t need damping systems.
10. In piezoelectric strain transducer voltage developed is _______________ to strain applied.
a) Directly proportional
b) Inversely proportional
c) Equal
d) Independent
View Answer
Explanation: For a piezoelectric strain transducer, as the strain applied increases output voltage also increases.
Sanfoundry Global Education & Learning Series – Instrumentation Transducers.
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